Question

A wire is bent into three circular segments, each of radius r =
8.5 cm, as shown in Fig. 30-46. Each segment is a quadrant of a
circle, ab lying in the xy plane, bc lying in the yz plane, and ca
lying in the zx plane. If a uniform magnetic field points in the
positive x direction, what is in volts the magnitude of the emf
developed in the wire when B increases at the rate of 2.7
mT/s?